CLIFTON PARK -- An overturned tanker truck carrying cement caused the southbound lanes of Northway Exit 9W to close for several hours Tuesday as emergency crews worked to right the heavy vehicle into the afternoon.

State police spokesman Mark Cepiel said the weight of the vehicle contributed to the delay in getting the truck cleared from the highway. He said more than one heavy-duty tow truck was needed to get the tanker upright so it could be towed.

By Tuesday afternoon, all three lanes of southbound traffic in that area of the Northway were flowing; only the exit remained closed until the late afternoon.

The accident slowed southbound traffic at the start of Tuesday's commute, when emergency responders arrived.

No serious injuries were reported in the incident, which occurred at about 6:30 a.m., and no details were available on the cause of the accident.